Relate HLT tracks to the primary vertex (Youri)

[u/mrichter/AliRoot.git] / PMD / AliPMDClusteringV1.h

#ifndef ALIPMDCLUSTERINGV1_H
#define ALIPMDCLUSTERINGV1_H
/* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
 * See cxx source for full Copyright notice                               */
//-----------------------------------------------------//
//                                                     //
//  Header File : PMDClusteringV1.h, Version 00        //
//                                                     //
//  Date   : September 26 2002                         //
//                                                     //
//  clustering code for alice pmd                      //
//                                                     //
//-----------------------------------------------------//
/* --------------------------------------------------------------------
   Code developed by S. C. Phatak, Institute of Physics,
   Bhubaneswar 751 005 ( phatak@iopb.res.in ) Given the energy deposited
   ( or ADC value ) in each cell of supermodule ( pmd or cpv ), the code
   builds up superclusters and breaks them into clusters. The input is 
   in array d[ndimx][ndimy] and cluster information is in array
   clusters[5][5000]. integer clno gives total number of clusters in the
   supermodule.
   d, clno  and clusters are the only global ( public ) variables. Others
   are local ( private ) to the code.
   At the moment, the data is read for whole detector ( all supermodules
   and pmd as well as cpv. This will have to be modify later )
   LAST UPDATE  :  October 23, 2002
-----------------------------------------------------------------------*/
#include "Rtypes.h"
#include "AliPMDClustering.h"

class TNtuple;
class TObjArray;
class AliPMDcluster;

class AliPMDClusteringV1: public AliPMDClustering
{

 public:
  AliPMDClusteringV1();
  virtual ~AliPMDClusteringV1();

  void     DoClust(Int_t idet, Int_t ismn, Double_t celladc[][96],
		   TObjArray *pmdcont);
  void     Order();
  
  Int_t    CrClust(Double_t ave, Double_t cutoff, Int_t nmx1);
  void     RefClust(Int_t incr);
  void     GaussFit(Int_t ncell, Int_t nclust, Double_t &x,
		    Double_t &y, Double_t &z, Double_t &xc,
		    Double_t &yc, Double_t &zc, Double_t &rc);
  Double_t Distance(Double_t x1, Double_t y1,
		    Double_t x2, Double_t y2);
  Double_t Ranmar() const;
  void     SetEdepCut(Float_t decut);
  
 protected:

  static const Double_t fgkSqroot3by2;  // fgkSqroot3by2 = sqrt(3.)/2.
  
  enum {
    kNMX    = 11424,
    kNDIMX  = 119,
    kNDIMY  = 96
  };
  
  /*
    kNMX   : # of cells in a supermodule
    kNDIMX : maximum number of cells along x direction (origin at one corner)
    kNDIMY : maximum number of cells along axis at 60 degrees with x axis
  */

  Double_t fEdepCell[kNDIMX][kNDIMY]; //energy(ADC) in each cell
  Double_t fClusters[5][5000];        // Cluster informations
  Int_t    fClno;                     // number of clusters in a supermodule

  /*
    clusters[0][i] --- x position of the cluster center
    clusters[1][i] --- y position of the cluster center
    clusters[2][i] --- total energy in the cluster
    clusters[3][i] --- number of cells forming the cluster
                       ( possibly fractional )
    clusters[4][i] --- cluster radius
  */

  //Variables for association
  Int_t fCellTrNo[kNDIMX][kNDIMY];     //id x-y value of cells
  Int_t fClTr[15][5000];               // 1d x-y cell info of attached cells

  Int_t    fIord[2][kNMX];             // ordered list of i and j according
                                       // to decreasing energy dep.
  Int_t    fInfocl[2][kNDIMX][kNDIMY]; // cellwise information on the cluster to which the cell
  Int_t    fInfcl[3][kNMX];            // cluster information [0][i]
                                       // -- cluster number
  Double_t fCoord[2][kNDIMX][kNDIMY];

  /*
    fIord --- ordered list of i and j according to decreasing energy dep.
    fInfocl --- cellwise information on the cluster to which the cell
    belongs and whether it has largest energy dep. or not
    ( now redundant - probably )
    fInfcl ---  cluster information [0][i] -- cluster number
    [1][i] -- i of the cell
    [2][i] -- j of the cell
    coord --- x and y coordinates of center of each cell
  */

  Float_t fCutoff; // Energy(ADC) cutoff per cell before clustering

  ClassDef(AliPMDClusteringV1,2) // Does clustering for PMD
};
#endif